Impromptu lesson of the day for the 4th grade was woven heart baskets. They already knew how to use the pattern and cut the paper. Just switched it up a little for the group that finished their Jim Dine weavings and were left with "nothing to do."
I've included this as a bonus with the original Jim Dine lesson over on TpT. I'm sure I'm not the only one with early finishers.